diff mbox series

[2/4] mmc: export mmc_send_ext_csd()

Message ID 20200330052419.3804-3-xypron.glpk@gmx.de
State Accepted
Commit 1601ea212623c9bdb479636bec9e7299b0cb14dd
Headers show
Series mmc: manage boot area protection | expand

Commit Message

Heinrich Schuchardt March 30, 2020, 5:24 a.m. UTC 
Export function mmc_send_ext_csd() for reading the extended CSD register.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 drivers/mmc/mmc.c |  2 +-
 include/mmc.h     | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

--
2.25.1
diff mbox series

Patch

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 3e36566693..bfcdaa665d 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -718,7 +718,7 @@  static int mmc_complete_op_cond(struct mmc *mmc)
 }


-static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
+int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
 {
 	struct mmc_cmd cmd;
 	struct mmc_data data;
diff --git a/include/mmc.h b/include/mmc.h
index 4ecd6c744c..85fc3497a1 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -896,6 +896,17 @@  int mmc_get_env_dev(void);
  */
 struct blk_desc *mmc_get_blk_desc(struct mmc *mmc);

+/**
+ * mmc_send_ext_csd() - read the extended CSD register
+ *
+ * @mmc:	MMC device
+ * @ext_csd	a cache aligned buffer of length MMC_MAX_BLOCK_LEN allocated by
+ *		the caller, e.g. using
+ *		ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN)
+ * Return:	0 for success
+ */
+int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd);
+
 static inline enum dma_data_direction mmc_get_dma_dir(struct mmc_data *data)
 {
 	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;